From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: Tue, 26 Jan 2021 22:14:33 +0000 (+0100)
Subject: rtc: rv3028: fix PORF handling
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f007c479c2d0ca0a537286511aa5d07b75755513;p=linux.git

rtc: rv3028: fix PORF handling

The PORF bit is cleared on interrupts which prevents the driver to know
when the time and date are invalid. Stop clearing PORF in the interrupt
handler.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210126221435.2152339-1-alexandre.belloni@bootlin.com
---

diff --git a/drivers/rtc/rtc-rv3028.c b/drivers/rtc/rtc-rv3028.c
index 2004f8c5397f7..4f8f6092097a1 100644
--- a/drivers/rtc/rtc-rv3028.c
+++ b/drivers/rtc/rtc-rv3028.c
@@ -268,6 +268,8 @@ static irqreturn_t rv3028_handle_irq(int irq, void *dev_id)
 	if (status & RV3028_STATUS_PORF)
 		dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n");
 
+	status &= ~RV3028_STATUS_PORF;
+
 	if (status & RV3028_STATUS_TF) {
 		status |= RV3028_STATUS_TF;
 		ctrl |= RV3028_CTRL2_TIE;